Folks, I’m trying to understand how Hadoop’s authentication architecture hangs together. I already have a Subject with a Kerberos principal and credentials, created programmatically using LoginContext. I’m using this Subject to access other Kerberos-auth’ed services. Can I not use this Subject (adding the right User principal so Hadoop will have its data) to auth to Hadoop without having to log in again? What do I have to do to get this Subject, or at least its principal, to work?
Thanks. I’m a little frustrated because it seems like it should be easier than this. -j
